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Re: [RFA] x86 - jump instruction after the prologue
Date: Tue, 27 Apr 2004 18:37:25 +0200
From: Jerome Guitton <guitton@act-europe.fr>
Ping? Still waiting for approval...
Sorry about that. I've reviewed your patch. I've tweaked the comment
a bit and checked in the attached.
Thanks,
Mark
Index: ChangeLog
from Jerome Guitton <guitton@gnat.com>
Mark Kettenis <kettenis@gnu.org>
* i386-tdep.c (i386_skip_prologue): follow the last jump only if
the function begins with a branch instruction.
Index: i386-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/i386-tdep.c,v
retrieving revision 1.188
diff -u -p -r1.188 i386-tdep.c
--- i386-tdep.c 29 Apr 2004 16:13:21 -0000 1.188
+++ i386-tdep.c 29 Apr 2004 16:20:47 -0000
@@ -750,7 +750,13 @@ i386_skip_prologue (CORE_ADDR start_pc)
}
}
- return i386_follow_jump (pc);
+ /* If the function starts with a branch (to startup code at the end)
+ the last instruction should bring us back to the first
+ instruction of the real code. */
+ if (i386_follow_jump (start_pc) != start_pc)
+ pc = i386_follow_jump (pc);
+
+ return pc;
}
/* This function is 64-bit safe. */